Quick Answer: Four Finger Support Clamp is a cork-lined, four-prong clamp of powder-coated zinc alloy with a 10.5 cm maximum opening, used to hold beakers, flasks, test tubes and burettes on a support frame or rod.
Last updated: October 2026
Key Features
Four cork-lined prongs for a cushioned, slip-resistant grip
Maximum opening 10.5 cm; accepts apparatus up to 8.5 cm
Mounts on rods up to 18 mm in diameter
Powder-coated zinc alloy, non-ferrous and rust-free
Screw adjustment with thread-fitted actuating joints
Technical Specifications
Specification
Value
Prongs
4 cork-lined prongs
Clamp opening
10.5 cm maximum
Accepted apparatus
Up to 8.5 cm
Rod accommodation
Up to 18 mm diameter rod
Material
Powder-coated zinc alloy
About This Product
The clamp is fitted to a frame or stand with a suitable boss head, and glassware is placed between the prongs before the screw is tightened slowly. It holds beakers, Erlenmeyer and boiling flasks, test tubes and burettes in chemistry and physics setups and reduces direct hand contact with mounted glass. Pressure is applied gradually, since overtightening can damage glassware.
Frequently Asked Questions
Q1. How does the cork lining help? The cork-lined prongs give a cushioned, slip-resistant hold, which suits delicate glass objects such as flasks and burettes.
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